JP2009249083A - Roller member supporting structure, and paper sheet handling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller member supporting structure capable of preventing invasion of paper powder and dust in a bearing member for pivotably supporting a roller member by a fixed shaft without increasing the number of part items and the cost, and a paper sheet handling device. <P>SOLUTION: The roller member supporting structure comprises a bearing member 3 arranged on an outer circumferential surface of a fixed shaft 2, a roller member 5 which is rotatably supported by an outer circumferential surface of the bearing member at a center part of an inner circumferential surface, and provided with an expansion part 5a overhung on both sides in the axial direction of the bearing member, and fall preventive members 15 for preventing the fall of a belt wound around the outer circumferential surface of the roller member. Each fall preventive member is constituted of a belt locking piece 16 opposingly arranged between both end faces of the roller member via a gap G, and a dustproof piece 17 which is protruded toward the bearing member from an inside diameter part of each belt locking piece with its fore end being abutted on a fixed part of the bearing member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement in a support structure for a roller member used for winding and running a belt for transporting paper sheets in a paper sheet handling apparatus having a mechanism for transporting paper sheets such as banknotes, and in particular. The present invention relates to a support structure for a roller member and a paper sheet handling device that prevents paper dust and dust from entering a bearing member that supports the roller member with respect to a fixed shaft without increasing the number of parts and increasing the cost.

Bill handling devices such as various vending machines, deposit / withdrawal devices, money changers, and inter-machines used in pachinko amusement halls have a paper sheet transport mechanism for transporting deposited bills into the device. . The paper sheet transport mechanism has a configuration in which an endless belt disposed along a predetermined path is wound around a plurality of rollers, and the belt is caused to travel by rotating and driving one of the rollers by a motor. Transport.
FIG. 3 shows a support structure of a roller member in a conventional paper sheet transport mechanism. An inner peripheral portion of the roller member 103 is rotatably supported on the outer periphery of the fixed shaft 100 via a bearing member 102. The roller member 103 is positioned in the axial direction by fixing the bearing member 102 to the fixed shaft 100 by a locking member 104 such as an E ring. In this manner, the roller member 103 is rotatably supported with respect to the outer periphery of the fixed shaft 100, and the belt 105 is wound around the outer surface of the roller member 103 to guide the running of the belt.

Incidentally, in the roller member support structure of FIG. 3, there is a space for interposing the bearing member 102 between the inner peripheral surface of the roller member 103 and the fixed shaft 100, and this space is exposed to the side. Structure. For this reason, paper dust and dust enter the bearing member 102 from this space and mix into the grease in the bearing member, which causes a rotation failure of the ball bearing and the like constituting the bearing member over time.
Although dust-proof bearings that prevent dust from entering by fitting dust-proof members such as rubber shields on both sides of the bearing member are commercially available, this increases costs.
In addition, a force in a direction different from the conveying direction may be applied to the belt due to bills or paper jams. In order to prevent the belt from detaching from the roller, it is common to use a barrel shape having the maximum diameter at the center of the roller. With this configuration, it is known that even when the belt is displaced, the belt operates to self-return to the center of the roller. Furthermore, a structure as in Patent Document 1 is proposed so that the belt does not come off even when a large external force is applied.

Patent Document 1 discloses a configuration in which flanges for preventing belt detachment are integrated via grooves on both sides in the axial direction of the roller member. This flange is a case where the belt is displaced from the roller member by a large external force. Even if it exists, it has a function to prevent the belt from falling out and to promote self-return of the belt. However, since the roller member and the flange are integrally fixed to the drive shaft, there is no bearing member between the drive shaft and the roller member in the first place, and the bearing is located inside the roller member. A configuration for eliminating the problem that dust adheres to and is attracted to members is not disclosed.
In addition, it is desirable to change the distance between the flange and the roller, that is, the width of the groove according to the width of the belt. However, since the flange and the roller are integrated, in order to meet the demand, it matches the belt width. There was no choice but to manufacture flanged rollers with groove widths individually.
The above-described problem is a problem that occurs not only in the banknote handling apparatus but also in a roller member support mechanism that is generally installed in a paper sheet handling apparatus that includes a mechanism for transporting various paper sheets.
JP-A-8-226529

As described above, in the conventional roller member support structure in which the roller member is rotatably supported via the bearing member disposed on the outer periphery of the fixed shaft, the bearing member does not cause an increase in cost due to an increase in the number of parts. On the other hand, there was no means for solving the problem that dust such as paper dust invades and deteriorates its function.
SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is used for winding and running a paper sheet transport belt in a paper sheet handling apparatus having a mechanism for transporting paper sheets such as banknotes. In the roller member support structure, a roller member support structure that prevents paper dust and dust from entering the bearing member that pivotally supports the roller member with respect to the fixed shaft without increasing the number of parts and increasing the cost, and The object is to provide a paper sheet handling device.

In order to achieve the above object, the roller member support structure according to the first aspect of the present invention comprises a bearing member disposed on the outer peripheral surface of the fixed shaft and a central portion of the inner peripheral surface rotatably supported by the outer peripheral surface of the bearing member. And a roller member having an overhanging portion overhanging on both axial sides of the bearing member, and fixedly disposed on the outer peripheral surface of the fixed shaft outside the both axial end portions of the roller member and wound around the outer peripheral surface of the roller member And a drop-off preventing member for preventing the belt from falling off, wherein each of the drop-off prevention members is disposed opposite to both end surfaces of the roller member via a gap. A belt locking piece; and a dust-proof piece projecting from the inner diameter portion of each belt locking piece toward the bearing member and having a tip portion in contact with a fixed part of the bearing member. It is characterized by that.
Without adding a special member to prevent paper dust and other dust from entering the bearing member when the roller member is rotatably supported via a bearing member arranged on the outer periphery of the fixed shaft, A maze-like space is formed on the outer side in the axial direction of the bearing member by utilizing a part of the fall-off preventing member for preventing the belt from being displaced around the roller member. For this reason, it is possible to prevent rotation failure due to paper dust or the like entering the bearing member over a long period of time without causing an increase in cost. In addition, the above effect can be realized by simply improving the structure in which a part of the inner diameter side of the drop-off preventing member is extended and brought into contact with the bearing member.
A roller member support structure according to a second aspect of the present invention is the roller member support structure according to the first aspect, wherein a spacer of an arbitrary size is interposed between the dustproof piece and the bearing member. It is characterized in that the gap interval between the two can be adjusted.
When the width size of the belt wound around the roller member is changed, the gap between the roller member and the drop-off preventing member can be adjusted using a spacer.
A paper sheet handling apparatus according to a third aspect of the present invention includes the support structure for the roller member.

In the present invention, a labyrinth-like space is formed on the outer side in the axial direction of the bearing member by utilizing a part of the slip-off preventing member for preventing the positional deviation of the belt wound around the roller member from falling off. Without causing an increase, it is possible to prevent paper dust and the like from entering the bearing member over a long period of time and causing a rotation failure.
Moreover, since the gap dimension between the roller member and the drop-off preventing member can be adjusted using the spacer, it is possible to cope with a change in the belt size wound around the roller member.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.
1A and 1B are a perspective view and a longitudinal sectional view showing a support structure of a roller member according to an embodiment of the present invention.
The roller member support structure 1 includes a fixed shaft 2, a bearing member 3 disposed on the outer peripheral surface of the fixed shaft 2, and a central portion of the inner peripheral surface rotatably supported by the outer peripheral surface of the bearing member 3. A roller member 5 having overhang portions 5a overhanging on both sides in the axial direction, and a belt 10 fixedly disposed on the outer peripheral surface of the fixed shaft outside the both axial ends of the roller member 5 and wound around the outer peripheral surface of the roller member A drop-off prevention member 15 for preventing the drop-out.
The bearing member 3 includes an inner annular piece (fixed part) 3a fixed to the outer periphery of the fixed shaft 2, an outer annular piece (movable part) 3b disposed on the outer diameter side of the inner annular piece 3a, and both annular pieces 3a. The outer annular piece 3b rotates relative to the inner annular piece 3a when the ball bearing 3c rolls.

The roller member 5 is a hollow body, and is rotatable with respect to the fixed shaft 2 by fixing the outer peripheral surface of the outer annular piece 3b to the center portion of the inner peripheral surface. A space is formed between the both overhang portions 5 a and the outer peripheral surface of the fixed shaft 2.
Each drop-off prevention member 15 is arranged to face the bearing member 3 from an inner diameter portion of each belt locking piece 16 and a belt locking piece 16 disposed to face each other with a gap G between both end surfaces of the roller member 5. And a dust-proof piece 17 that protrudes and abuts the protrusion 17a at the tip end portion against the inner annular piece (fixed part) 3a of the bearing member. The dropout prevention member 15 is fixed on the fixed shaft 2 using an E ring 25.
The protrusion 17a has a thin thickness commensurate with the thickness of the inner annular piece 3a, and is between the inner end face 17b of the dustproof piece 17 located on the outer diameter side of the protrusion 17a and the side end face of the bearing member 3. A predetermined narrow space S1 is formed. Further, the dust-proof piece 17 forms a narrow second space S2 between the outer peripheral surface thereof and the inner peripheral surface of the overhang portion 5a of the roller member. The first space S1 and the second space S2 communicate with each other to form a bent maze-like narrow space. Accordingly, the dust-proof piece 17 is fixed on the fixed shaft 2 in a non-contact state with the outer annular piece 3 b and the ball bearing 3 c which are movable parts of the bearing member 3 and further with the roller member 5.

As described above, in the present invention, the dust-proof piece 17 constituting a part of the drop-off prevention member 15 is disposed in the wide space conventionally formed between the fixed shaft 2 and the overhanging portion 5a of the roller member, thereby forming a labyrinth. Since the narrow spaces S1 and S2 are formed, it is possible to greatly reduce the occurrence of a problem that paper dust or other dust enters the inside of the bearing member and causes rotation failure with time. Further, since the dust-proof narrow spaces S1 and S2 are formed by using the dust-proof pieces 17 as a part of the drop-off preventing member 15 disposed on both sides of the roller member, it is not necessary to use an expensive bearing member with a seal, Cost increase can be prevented.
In particular, it has been confirmed by experiments that the space S2 interval affects the dustproof effect, and it is desirable to set the distance to about 0.2 mm in consideration of manufacturing variations of each member.

Next, FIG. 2 is an enlarged view of a main part showing another embodiment of the roller member support structure of the present invention. In this embodiment, when the width of the belt 10 that is hung around the roller member 5 having the same size is changed and it is necessary to use a wide belt, the roller member 5 and the belt are locked together with the increase in the belt width. The gap G between the pieces 16 can be enlarged. That is, in this embodiment, the gap G is set to an arbitrary size by interposing the annular spacer 20 between the inner annular piece 3a constituting the bearing member 3 and the protrusion 17a at the tip of the dust-proof piece 17. It is configured as possible.
The spacer 20 is a ring member having a thickness equivalent to that of the inner annular piece 3a. A plurality of types of spacers 20 having different width dimensions are prepared in advance, and the spacers 20 are selectively used according to the belt width to be applied.
According to this, the gap G can be changed to cope with the change in the belt width without preparing and changing the drop-off preventing members 15 having different sizes in advance.
By arranging the spacer 20, the space S <b> 1 is widened. However, since the gap between the roller member 5 and the dust-proof piece 17 in the space S <b> 2 is maintained, there is no concern that the dust-proof effect is reduced. When the gap G is greatly expanded, a spacer having the same tip shape as the tip portions 17a and 17b of the dust-proof piece 17 may be used as the spacer 20 as shown in FIG.

As described above, according to the present invention, a labyrinth-like shape is formed on the outer side in the axial direction of the bearing member 3 by using a part of the drop-off preventing member 15 for preventing the position shift of the belt 10 wound around the roller member 5. Since the space is formed, it is possible to prevent paper dust and other dust from entering the bearing member at a low cost without adding a special member. For this reason, it is possible to prevent paper dust or the like from entering the bearing member over a long period of time and causing rotation failure. Another advantage is that the above-described effect can be realized by simply improving the structure by extending a part of the inner diameter side of the drop-off prevention member and bringing it into contact with the bearing member.
Further, when the width size of the belt wound around the roller member 5 is changed, the gap between the roller member and the drop-off preventing member can be adjusted using the spacer 20.
The roller member support structure of the present invention is a paper sheet handling apparatus having a paper sheet transport mechanism for transporting paper sheets such as banknotes by a belt 10 wound around the outer peripheral surface of the roller member 5, for example, various vending machines. It can be applied to a machine, a deposit / withdrawal device, a money changer, and a pedestrian machine used in pachinko machines.

(A) And (b) is the perspective view and longitudinal cross-sectional view which show the support structure of the roller member which concerns on one Embodiment of this invention. (A) And (b) is a principal part enlarged view which shows other embodiment of the support structure of the roller member of this invention. It is sectional drawing which shows the support structure of the roller member in the conventional paper sheet conveyance mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support structure, 2 ... Fixed shaft, 3 ... Bearing member, 3a ... Inner annular piece (fixed part), 3b ... Outer annular piece, 3c ... Ball bearing, 5 ... Roller member, 5a ... Overhang | projection part, 10 ... Belt,
DESCRIPTION OF SYMBOLS 15 ... Drop-off prevention member, 16 ... Belt locking piece, 17 ... Dust-proof piece, 17a ... Projection, 17b ... Inner end surface, 20 ... Spacer, 25 ... E ring

Claims (3)

A bearing member disposed on the outer peripheral surface of the fixed shaft, and a roller member having a projecting portion that is rotatably supported by the outer peripheral surface of the bearing member and has an overhang on both axial sides of the bearing member. A drop-off preventing member that is fixedly arranged on the outer peripheral surface of the fixed shaft outside the both axial ends of the roller member and prevents the belt wound around the outer peripheral surface of the roller member from falling off. Structure,
Each of the drop-off prevention members protrudes toward the bearing member from a belt locking piece disposed opposite to both end surfaces of the roller member via a gap, and an inner diameter portion of each belt locking piece. And a dust-proof piece whose tip is in contact with a fixed part of the bearing member.   2. The gap interval between the roller member and the belt locking piece can be adjusted by interposing a spacer of an arbitrary size between the dust-proof piece and the bearing member. The support structure of the roller member as described in 2.   A paper sheet handling apparatus comprising the roller member support structure according to claim 1.

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